Investigation of dendrite growth, Nb segregation during laser IN718 deposition via volume of fluid-phase field modeling
In this work, a macro-micro VOF-PF (Volume of Fluid-Phase field) model is established to simulate the heat transfer, dendrite growth and Nb segregation during the laser IN718 deposition. According to calculated heat transfers, G increases, while Vp decreases, and the corresponding G×Vp decreases fro...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422014429 |
| _version_ | 1798006124714131456 |
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| author | Lei Wang He Li Yan Song Jialiang Ding Runhuan Cai Yong Peng Yong Huang Kehong Wang |
| author_facet | Lei Wang He Li Yan Song Jialiang Ding Runhuan Cai Yong Peng Yong Huang Kehong Wang |
| author_sort | Lei Wang |
| collection | DOAJ |
| description | In this work, a macro-micro VOF-PF (Volume of Fluid-Phase field) model is established to simulate the heat transfer, dendrite growth and Nb segregation during the laser IN718 deposition. According to calculated heat transfers, G increases, while Vp decreases, and the corresponding G×Vp decreases from top to bottom in the molten pool. The calculated the primary dendrite arm spacing (PDAS) using the PF model increases from top to bottom. Compared with other models, the calculated PDAS using the PF model considering the liquid-metal flow is closest to experiment measurements. During the dendrite growth, Nb is enriched in the interdendritic region, and finally is distributed in the droplet shape. The calculated actual solute distribution coefficient Cmin/Cmax decreases from 0.584 to 5.548 with the decrease of G×Vp, which follows the equilibrium solidification theory. According to dc/dy=G/ml, the liquidus slope ml is calculated as 0.05322wt.%/μm very close to the theoretical value 0.05394wt.%/μm. The simulated Nb concentrations in the matrix γ and Laves phases are 3.97wt.%, 13.3wt.% respectively, which are in good agreements with experimental 3.7wt.% and 13wt.%. |
| first_indexed | 2024-04-11T12:50:07Z |
| format | Article |
| id | doaj.art-cb7d2c486af44a9b95ee1bb5fc493ea0 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T12:50:07Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-cb7d2c486af44a9b95ee1bb5fc493ea02022-12-22T04:23:14ZengElsevierJournal of Materials Research and Technology2238-78542022-11-0121404415Investigation of dendrite growth, Nb segregation during laser IN718 deposition via volume of fluid-phase field modelingLei Wang0He Li1Yan Song2Jialiang Ding3Runhuan Cai4Yong Peng5Yong Huang6Kehong Wang7School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, China; Corresponding author. School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, ChinaInner Mongolia First Machinery Group Co, LTDSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, ChinaIn this work, a macro-micro VOF-PF (Volume of Fluid-Phase field) model is established to simulate the heat transfer, dendrite growth and Nb segregation during the laser IN718 deposition. According to calculated heat transfers, G increases, while Vp decreases, and the corresponding G×Vp decreases from top to bottom in the molten pool. The calculated the primary dendrite arm spacing (PDAS) using the PF model increases from top to bottom. Compared with other models, the calculated PDAS using the PF model considering the liquid-metal flow is closest to experiment measurements. During the dendrite growth, Nb is enriched in the interdendritic region, and finally is distributed in the droplet shape. The calculated actual solute distribution coefficient Cmin/Cmax decreases from 0.584 to 5.548 with the decrease of G×Vp, which follows the equilibrium solidification theory. According to dc/dy=G/ml, the liquidus slope ml is calculated as 0.05322wt.%/μm very close to the theoretical value 0.05394wt.%/μm. The simulated Nb concentrations in the matrix γ and Laves phases are 3.97wt.%, 13.3wt.% respectively, which are in good agreements with experimental 3.7wt.% and 13wt.%.http://www.sciencedirect.com/science/article/pii/S2238785422014429Dendrite growthNb segregationIN718Phase field |
| spellingShingle | Lei Wang He Li Yan Song Jialiang Ding Runhuan Cai Yong Peng Yong Huang Kehong Wang Investigation of dendrite growth, Nb segregation during laser IN718 deposition via volume of fluid-phase field modeling Journal of Materials Research and Technology Dendrite growth Nb segregation IN718 Phase field |
| title | Investigation of dendrite growth, Nb segregation during laser IN718 deposition via volume of fluid-phase field modeling |
| title_full | Investigation of dendrite growth, Nb segregation during laser IN718 deposition via volume of fluid-phase field modeling |
| title_fullStr | Investigation of dendrite growth, Nb segregation during laser IN718 deposition via volume of fluid-phase field modeling |
| title_full_unstemmed | Investigation of dendrite growth, Nb segregation during laser IN718 deposition via volume of fluid-phase field modeling |
| title_short | Investigation of dendrite growth, Nb segregation during laser IN718 deposition via volume of fluid-phase field modeling |
| title_sort | investigation of dendrite growth nb segregation during laser in718 deposition via volume of fluid phase field modeling |
| topic | Dendrite growth Nb segregation IN718 Phase field |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422014429 |
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